I picked up this rusty schwinn behind an old gas station in New Jersey. The numbers on the rear say it's a 1956 schwinn. What are the other numbers on the bottom of the crank housing? The chain guard says tornado. And the fenders match. I'll let the pictures show the rest. It's been this way for a long time. I changed the wheels and tires to make it rideable. Kept the old ones. What is this thing?